永磁同步电机方波控制技术探讨

Discussion of Square Wave Control Technology for Permanent Magnet Synchronous Motor

永磁同步电机在方波模式下具有满电压输出的突出优点,可以极大提高系统的输出功率,特别适合高转速和高功率应用场合。但普通的方波控制存在需要模式切换、动态性能差等缺点。通过采用调制线性化、增加基波电流观测器和采用动态弱磁技术等方法,统一了全速段永磁同步电机矢量控制方法。仿真验证表明,文章所提出的方法在方波工况下具有高性能转矩响应能力。

Permanent magnet synchronous motor(PMSM) has the outstanding advantage of full voltage output in square wave mode, which can greatly improve the output power of the system, especially for high speed and high power applications. However, the common square wave control has some shortcomings such as mode switching and poor dynamic performance. By using modulation linearization, adding fundamental current observer and dynamic flux weakening technology, the vector control method of full speed permanent magnet synchronous motor was unified. Simulation results showed that the proposed method has high performance torque response capability under square wave conditions.